| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser printer which can accelerate a printing speed.SOLUTION: A laser printer comprises an edge-emitting semiconductor laser element 10 which includes a lower cladding layer, an upper cladding layer, an active layer, a photonic crystal layer, and a plurality of driving electrodes, and generates laser beams from a plurality of areas by supply of driving current. The plurality of areas are located so as to be parallel to a light emitting end surface of the semiconductor laser element 10 and so as to be arranged in a first direction where the active layer extends, and the emitting directions of laser beams, generated in the plurality of areas, from the light emitting end surface are different from each other. The semiconductor laser element 10 and a photosensitive drum 102 are arranged so that the laser beams emitted from the plurality of areas are applied to different positions along a direction parallel to the first direction on the photosensitive drum 102. |
